1. Koo JH. A study on models for the child welfare services in local community improvement [dissertation]. 2007. Cheongyang (KR): Korea International Culture Univ..
2. Kim HJ, Son JA, Kim JY, Ahn DH. Changing social background pattern of children in adoption institutions (the 4th report). J Korean Pediatr Soc. 1999. 42:115–121.
3. Byon MS. A study on the unmarried mothers' social problems and their welfare improvement [dissertation]. 2001. Seoul (KR): Dankook Univ..
4. Park KA, Kim SC, Ahn BJ, Ryoo HC. Childbirth teenage. Korean J Obstet Gynecol. 1975. 18:923–928.
5. Kang MS, Lee JY, Lee SH, Oh EH, Lee CW, Choi B, et al. The obstetrical and statistical aspects of the unmarried mother. Korean J Obstet Gynecol. 2002. 45:1347–1353.
6. Joo SH, Jung Dw, Beak JY, Lee JY, Sohn IS, Kim SY, et al. A study on pregnancy and social welfare of unmarried mother. Korean J Obstet Gynecol. 2005. 48:1760–1766.
7. Jadva V, Badger S, Morrissette M, Golombok S. 'Mom by choice, single by life's circumstance...' Findings from a large scale survey of the experiences of single mothers by choice. Hum Fertil (Camb). 2009. 12:175–184.
8. Chhabra S, Palaparthy S, Mishra S. Social issues around advanced unwanted pregnancies in rural single women. J Obstet Gynaecol. 2009. 29:333–336.
9. Kim JY. Overseas adoption in Korea. Korean J Pediatr. 2009. 52:410–416.